The Freudenberg-NOK N903X O-Ring is a precision-engineered sealing component with a diameter of 5.100 inches and a cross-section of 0.210 inches, made from durable 90 durometer NBR (Nitrile Butadiene Rubber). This O-Ring is specifically designed for use in hydraulic and pneumatic applications, offering excellent resistance to a variety of fluids, including oils and fuels. Its robust construction ensures compliance with industry standards, making it a reliable choice for engineers and technicians seeking effective sealing solutions.